Electronic – the purpose of the T-568 ethernet color code standard

ethernet

A question came into mind. as i was crimping some ethernet cables at home.

I am talking about straight cable not crossover cables.

What is the true reason for the T-568A or T-568B color standard. Because just arranging the wire in sequence will work just fine as long as the wire is connected on the same pin on the other end, arranging them in sequence will also give a cleaner crimp.

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in the image ont T568A blue is sandwich between the orange ? why is that?

Is it to reduce noise ?

if so how will it affect on different category? cat 5, 5e, 6, 7, and 8

Best Answer

In comments you clarified,

what i meant was why did the TIA standard not make the standard make it in a sequence in the first place, since most of the time they are in a twisted pair and beside each other.

This keeps the pin assignments compatible with the telephone modular connector that it's derived from.

With this arrangement, a cable can be repurposed from voice use to data without re-terminating it. The blue pair can even be used for voice while the orange and green pairs are used for 10 or 100 Mbps Ethernet in the same cable.

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